//---------------------------------------------------------------------
// QRCode for JavaScript
//
// Copyright (c) 2009 Kazuhiko Arase
//
// URL: http://www.d-project.com/
//
// Licensed under the MIT license:
//   http://www.opensource.org/licenses/mit-license.php
//
// The word "QR Code" is registered trademark of 
// DENSO WAVE INCORPORATED
//   http://www.denso-wave.com/qrcode/faqpatent-e.html
//
//---------------------------------------------------------------------

//---------------------------------------------------------------------
// QR8bitByte
//---------------------------------------------------------------------

function QR8bitByte(data) {
  this.mode = QRMode.MODE_8BIT_BYTE;
  this.data = data;
}

QR8bitByte.prototype = {

  getLength : function(buffer) {
    return this.data.length;
  },
  
  write : function(buffer) {
    for (var i = 0; i < this.data.length; i++) {
      // not JIS ...
      buffer.put(this.data.charCodeAt(i), 8);
    }
  }
};

//---------------------------------------------------------------------
// QRCode
//---------------------------------------------------------------------

function QRCode(typeNumber, errorCorrectLevel) {
  this.typeNumber = typeNumber;
  this.errorCorrectLevel = errorCorrectLevel;
  this.modules = null;
  this.moduleCount = 0;
  this.dataCache = null;
  this.dataList = new Array();
}

QRCode.prototype = {
  
  addData : function(data) {
    var newData = new QR8bitByte(data);
    this.dataList.push(newData);
    this.dataCache = null;
  },
  
  isDark : function(row, col) {
    if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
      throw new Error(row + "," + col);
    }
    return this.modules[row][col];
  },

  getModuleCount : function() {
    return this.moduleCount;
  },
  
  make : function() {
    // Calculate automatically typeNumber if provided is < 1
    if (this.typeNumber < 1 ){
      var typeNumber = 1;
      for (typeNumber = 1; typeNumber < 40; typeNumber++) {
        var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel);

        var buffer = new QRBitBuffer();
        var totalDataCount = 0;
        for (var i = 0; i < rsBlocks.length; i++) {
          totalDataCount += rsBlocks[i].dataCount;
        }

        for (var i = 0; i < this.dataList.length; i++) {
          var data = this.dataList[i];
          buffer.put(data.mode, 4);
          buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) );
          data.write(buffer);
        }
        if (buffer.getLengthInBits() <= totalDataCount * 8)
          break;
      }
      this.typeNumber = typeNumber;
    }
    this.makeImpl(false, this.getBestMaskPattern() );
  },
  
  makeImpl : function(test, maskPattern) {
    
    this.moduleCount = this.typeNumber * 4 + 17;
    this.modules = new Array(this.moduleCount);
    
    for (var row = 0; row < this.moduleCount; row++) {
      
      this.modules[row] = new Array(this.moduleCount);
      
      for (var col = 0; col < this.moduleCount; col++) {
        this.modules[row][col] = null;//(col + row) % 3;
      }
    }
  
    this.setupPositionProbePattern(0, 0);
    this.setupPositionProbePattern(this.moduleCount - 7, 0);
    this.setupPositionProbePattern(0, this.moduleCount - 7);
    this.setupPositionAdjustPattern();
    this.setupTimingPattern();
    this.setupTypeInfo(test, maskPattern);
    
    if (this.typeNumber >= 7) {
      this.setupTypeNumber(test);
    }
  
    if (this.dataCache == null) {
      this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
    }
  
    this.mapData(this.dataCache, maskPattern);
  },

  setupPositionProbePattern : function(row, col)  {
    
    for (var r = -1; r <= 7; r++) {
      
      if (row + r <= -1 || this.moduleCount <= row + r) continue;
      
      for (var c = -1; c <= 7; c++) {
        
        if (col + c <= -1 || this.moduleCount <= col + c) continue;
        
        if ( (0 <= r && r <= 6 && (c == 0 || c == 6) )
            || (0 <= c && c <= 6 && (r == 0 || r == 6) )
            || (2 <= r && r <= 4 && 2 <= c && c <= 4) ) {
          this.modules[row + r][col + c] = true;
        } else {
          this.modules[row + r][col + c] = false;
        }
      }   
    }   
  },
  
  getBestMaskPattern : function() {
  
    var minLostPoint = 0;
    var pattern = 0;
  
    for (var i = 0; i < 8; i++) {
      
      this.makeImpl(true, i);
  
      var lostPoint = QRUtil.getLostPoint(this);
  
      if (i == 0 || minLostPoint >  lostPoint) {
        minLostPoint = lostPoint;
        pattern = i;
      }
    }
  
    return pattern;
  },
  
  createMovieClip : function(target_mc, instance_name, depth) {
  
    var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
    var cs = 1;
  
    this.make();

    for (var row = 0; row < this.modules.length; row++) {
      
      var y = row * cs;
      
      for (var col = 0; col < this.modules[row].length; col++) {
  
        var x = col * cs;
        var dark = this.modules[row][col];
      
        if (dark) {
          qr_mc.beginFill(0, 100);
          qr_mc.moveTo(x, y);
          qr_mc.lineTo(x + cs, y);
          qr_mc.lineTo(x + cs, y + cs);
          qr_mc.lineTo(x, y + cs);
          qr_mc.endFill();
        }
      }
    }
    
    return qr_mc;
  },

  setupTimingPattern : function() {
    
    for (var r = 8; r < this.moduleCount - 8; r++) {
      if (this.modules[r][6] != null) {
        continue;
      }
      this.modules[r][6] = (r % 2 == 0);
    }
  
    for (var c = 8; c < this.moduleCount - 8; c++) {
      if (this.modules[6][c] != null) {
        continue;
      }
      this.modules[6][c] = (c % 2 == 0);
    }
  },
  
  setupPositionAdjustPattern : function() {
  
    var pos = QRUtil.getPatternPosition(this.typeNumber);
    
    for (var i = 0; i < pos.length; i++) {
    
      for (var j = 0; j < pos.length; j++) {
      
        var row = pos[i];
        var col = pos[j];
        
        if (this.modules[row][col] != null) {
          continue;
        }
        
        for (var r = -2; r <= 2; r++) {
        
          for (var c = -2; c <= 2; c++) {
          
            if (r == -2 || r == 2 || c == -2 || c == 2 
                || (r == 0 && c == 0) ) {
              this.modules[row + r][col + c] = true;
            } else {
              this.modules[row + r][col + c] = false;
            }
          }
        }
      }
    }
  },
  
  setupTypeNumber : function(test) {
  
    var bits = QRUtil.getBCHTypeNumber(this.typeNumber);
  
    for (var i = 0; i < 18; i++) {
      var mod = (!test && ( (bits >> i) & 1) == 1);
      this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
    }
  
    for (var i = 0; i < 18; i++) {
      var mod = (!test && ( (bits >> i) & 1) == 1);
      this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
    }
  },
  
  setupTypeInfo : function(test, maskPattern) {
  
    var data = (this.errorCorrectLevel << 3) | maskPattern;
    var bits = QRUtil.getBCHTypeInfo(data);
  
    // vertical   
    for (var i = 0; i < 15; i++) {
  
      var mod = (!test && ( (bits >> i) & 1) == 1);
  
      if (i < 6) {
        this.modules[i][8] = mod;
      } else if (i < 8) {
        this.modules[i + 1][8] = mod;
      } else {
        this.modules[this.moduleCount - 15 + i][8] = mod;
      }
    }
  
    // horizontal
    for (var i = 0; i < 15; i++) {
  
      var mod = (!test && ( (bits >> i) & 1) == 1);
      
      if (i < 8) {
        this.modules[8][this.moduleCount - i - 1] = mod;
      } else if (i < 9) {
        this.modules[8][15 - i - 1 + 1] = mod;
      } else {
        this.modules[8][15 - i - 1] = mod;
      }
    }
  
    // fixed module
    this.modules[this.moduleCount - 8][8] = (!test);
  
  },
  
  mapData : function(data, maskPattern) {
    
    var inc = -1;
    var row = this.moduleCount - 1;
    var bitIndex = 7;
    var byteIndex = 0;
    
    for (var col = this.moduleCount - 1; col > 0; col -= 2) {
  
      if (col == 6) col--;
  
      while (true) {
  
        for (var c = 0; c < 2; c++) {
          
          if (this.modules[row][col - c] == null) {
            
            var dark = false;
  
            if (byteIndex < data.length) {
              dark = ( ( (data[byteIndex] >>> bitIndex) & 1) == 1);
            }
  
            var mask = QRUtil.getMask(maskPattern, row, col - c);
  
            if (mask) {
              dark = !dark;
            }
            
            this.modules[row][col - c] = dark;
            bitIndex--;
  
            if (bitIndex == -1) {
              byteIndex++;
              bitIndex = 7;
            }
          }
        }
                
        row += inc;
  
        if (row < 0 || this.moduleCount <= row) {
          row -= inc;
          inc = -inc;
          break;
        }
      }
    }
    
  }

};

QRCode.PAD0 = 0xEC;
QRCode.PAD1 = 0x11;

QRCode.createData = function(typeNumber, errorCorrectLevel, dataList) {
  
  var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
  
  var buffer = new QRBitBuffer();
  
  for (var i = 0; i < dataList.length; i++) {
    var data = dataList[i];
    buffer.put(data.mode, 4);
    buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) );
    data.write(buffer);
  }

  // calc num max data.
  var totalDataCount = 0;
  for (var i = 0; i < rsBlocks.length; i++) {
    totalDataCount += rsBlocks[i].dataCount;
  }

  if (buffer.getLengthInBits() > totalDataCount * 8) {
    throw new Error("code length overflow. ("
      + buffer.getLengthInBits()
      + ">"
      +  totalDataCount * 8
      + ")");
  }

  // end code
  if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
    buffer.put(0, 4);
  }

  // padding
  while (buffer.getLengthInBits() % 8 != 0) {
    buffer.putBit(false);
  }

  // padding
  while (true) {
    
    if (buffer.getLengthInBits() >= totalDataCount * 8) {
      break;
    }
    buffer.put(QRCode.PAD0, 8);
    
    if (buffer.getLengthInBits() >= totalDataCount * 8) {
      break;
    }
    buffer.put(QRCode.PAD1, 8);
  }

  return QRCode.createBytes(buffer, rsBlocks);
}

QRCode.createBytes = function(buffer, rsBlocks) {

  var offset = 0;
  
  var maxDcCount = 0;
  var maxEcCount = 0;
  
  var dcdata = new Array(rsBlocks.length);
  var ecdata = new Array(rsBlocks.length);
  
  for (var r = 0; r < rsBlocks.length; r++) {

    var dcCount = rsBlocks[r].dataCount;
    var ecCount = rsBlocks[r].totalCount - dcCount;

    maxDcCount = Math.max(maxDcCount, dcCount);
    maxEcCount = Math.max(maxEcCount, ecCount);
    
    dcdata[r] = new Array(dcCount);
    
    for (var i = 0; i < dcdata[r].length; i++) {
      dcdata[r][i] = 0xff & buffer.buffer[i + offset];
    }
    offset += dcCount;
    
    var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
    var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);

    var modPoly = rawPoly.mod(rsPoly);
    ecdata[r] = new Array(rsPoly.getLength() - 1);
    for (var i = 0; i < ecdata[r].length; i++) {
            var modIndex = i + modPoly.getLength() - ecdata[r].length;
      ecdata[r][i] = (modIndex >= 0)? modPoly.get(modIndex) : 0;
    }

  }
  
  var totalCodeCount = 0;
  for (var i = 0; i < rsBlocks.length; i++) {
    totalCodeCount += rsBlocks[i].totalCount;
  }

  var data = new Array(totalCodeCount);
  var index = 0;

  for (var i = 0; i < maxDcCount; i++) {
    for (var r = 0; r < rsBlocks.length; r++) {
      if (i < dcdata[r].length) {
        data[index++] = dcdata[r][i];
      }
    }
  }

  for (var i = 0; i < maxEcCount; i++) {
    for (var r = 0; r < rsBlocks.length; r++) {
      if (i < ecdata[r].length) {
        data[index++] = ecdata[r][i];
      }
    }
  }

  return data;

}

//---------------------------------------------------------------------
// QRMode
//---------------------------------------------------------------------

var QRMode = {
  MODE_NUMBER :   1 << 0,
  MODE_ALPHA_NUM :  1 << 1,
  MODE_8BIT_BYTE :  1 << 2,
  MODE_KANJI :    1 << 3
};

//---------------------------------------------------------------------
// QRErrorCorrectLevel
//---------------------------------------------------------------------
 
var QRErrorCorrectLevel = {
  L : 1,
  M : 0,
  Q : 3,
  H : 2
};

//---------------------------------------------------------------------
// QRMaskPattern
//---------------------------------------------------------------------

var QRMaskPattern = {
  PATTERN000 : 0,
  PATTERN001 : 1,
  PATTERN010 : 2,
  PATTERN011 : 3,
  PATTERN100 : 4,
  PATTERN101 : 5,
  PATTERN110 : 6,
  PATTERN111 : 7
};

//---------------------------------------------------------------------
// QRUtil
//---------------------------------------------------------------------
 
var QRUtil = {

    PATTERN_POSITION_TABLE : [
      [],
      [6, 18],
      [6, 22],
      [6, 26],
      [6, 30],
      [6, 34],
      [6, 22, 38],
      [6, 24, 42],
      [6, 26, 46],
      [6, 28, 50],
      [6, 30, 54],    
      [6, 32, 58],
      [6, 34, 62],
      [6, 26, 46, 66],
      [6, 26, 48, 70],
      [6, 26, 50, 74],
      [6, 30, 54, 78],
      [6, 30, 56, 82],
      [6, 30, 58, 86],
      [6, 34, 62, 90],
      [6, 28, 50, 72, 94],
      [6, 26, 50, 74, 98],
      [6, 30, 54, 78, 102],
      [6, 28, 54, 80, 106],
      [6, 32, 58, 84, 110],
      [6, 30, 58, 86, 114],
      [6, 34, 62, 90, 118],
      [6, 26, 50, 74, 98, 122],
      [6, 30, 54, 78, 102, 126],
      [6, 26, 52, 78, 104, 130],
      [6, 30, 56, 82, 108, 134],
      [6, 34, 60, 86, 112, 138],
      [6, 30, 58, 86, 114, 142],
      [6, 34, 62, 90, 118, 146],
      [6, 30, 54, 78, 102, 126, 150],
      [6, 24, 50, 76, 102, 128, 154],
      [6, 28, 54, 80, 106, 132, 158],
      [6, 32, 58, 84, 110, 136, 162],
      [6, 26, 54, 82, 110, 138, 166],
      [6, 30, 58, 86, 114, 142, 170]
    ],

    G15 : (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    G18 : (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    G15_MASK : (1 << 14) | (1 << 12) | (1 << 10)  | (1 << 4) | (1 << 1),

    getBCHTypeInfo : function(data) {
      var d = data << 10;
      while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
        d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) ) );  
      }
      return ( (data << 10) | d) ^ QRUtil.G15_MASK;
    },

    getBCHTypeNumber : function(data) {
      var d = data << 12;
      while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
        d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) ) );  
      }
      return (data << 12) | d;
    },

    getBCHDigit : function(data) {

      var digit = 0;

      while (data != 0) {
        digit++;
        data >>>= 1;
      }

      return digit;
    },

    getPatternPosition : function(typeNumber) {
      return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
    },

    getMask : function(maskPattern, i, j) {
      
      switch (maskPattern) {
        
      case QRMaskPattern.PATTERN000 : return (i + j) % 2 == 0;
      case QRMaskPattern.PATTERN001 : return i % 2 == 0;
      case QRMaskPattern.PATTERN010 : return j % 3 == 0;
      case QRMaskPattern.PATTERN011 : return (i + j) % 3 == 0;
      case QRMaskPattern.PATTERN100 : return (Math.floor(i / 2) + Math.floor(j / 3) ) % 2 == 0;
      case QRMaskPattern.PATTERN101 : return (i * j) % 2 + (i * j) % 3 == 0;
      case QRMaskPattern.PATTERN110 : return ( (i * j) % 2 + (i * j) % 3) % 2 == 0;
      case QRMaskPattern.PATTERN111 : return ( (i * j) % 3 + (i + j) % 2) % 2 == 0;

      default :
        throw new Error("bad maskPattern:" + maskPattern);
      }
    },

    getErrorCorrectPolynomial : function(errorCorrectLength) {

      var a = new QRPolynomial([1], 0);

      for (var i = 0; i < errorCorrectLength; i++) {
        a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0) );
      }

      return a;
    },

    getLengthInBits : function(mode, type) {

      if (1 <= type && type < 10) {

        // 1 - 9

        switch(mode) {
        case QRMode.MODE_NUMBER   : return 10;
        case QRMode.MODE_ALPHA_NUM  : return 9;
        case QRMode.MODE_8BIT_BYTE  : return 8;
        case QRMode.MODE_KANJI    : return 8;
        default :
          throw new Error("mode:" + mode);
        }

      } else if (type < 27) {

        // 10 - 26

        switch(mode) {
        case QRMode.MODE_NUMBER   : return 12;
        case QRMode.MODE_ALPHA_NUM  : return 11;
        case QRMode.MODE_8BIT_BYTE  : return 16;
        case QRMode.MODE_KANJI    : return 10;
        default :
          throw new Error("mode:" + mode);
        }

      } else if (type < 41) {

        // 27 - 40

        switch(mode) {
        case QRMode.MODE_NUMBER   : return 14;
        case QRMode.MODE_ALPHA_NUM  : return 13;
        case QRMode.MODE_8BIT_BYTE  : return 16;
        case QRMode.MODE_KANJI    : return 12;
        default :
          throw new Error("mode:" + mode);
        }

      } else {
        throw new Error("type:" + type);
      }
    },

    getLostPoint : function(qrCode) {
      
      var moduleCount = qrCode.getModuleCount();
      
      var lostPoint = 0;
      
      // LEVEL1
      
      for (var row = 0; row < moduleCount; row++) {

        for (var col = 0; col < moduleCount; col++) {

          var sameCount = 0;
          var dark = qrCode.isDark(row, col);

        for (var r = -1; r <= 1; r++) {

            if (row + r < 0 || moduleCount <= row + r) {
              continue;
            }

            for (var c = -1; c <= 1; c++) {

              if (col + c < 0 || moduleCount <= col + c) {
                continue;
              }

              if (r == 0 && c == 0) {
                continue;
              }

              if (dark == qrCode.isDark(row + r, col + c) ) {
                sameCount++;
              }
            }
          }

          if (sameCount > 5) {
            lostPoint += (3 + sameCount - 5);
          }
        }
      }

      // LEVEL2

      for (var row = 0; row < moduleCount - 1; row++) {
        for (var col = 0; col < moduleCount - 1; col++) {
          var count = 0;
          if (qrCode.isDark(row,     col    ) ) count++;
          if (qrCode.isDark(row + 1, col    ) ) count++;
          if (qrCode.isDark(row,     col + 1) ) count++;
          if (qrCode.isDark(row + 1, col + 1) ) count++;
          if (count == 0 || count == 4) {
            lostPoint += 3;
          }
        }
      }

      // LEVEL3

      for (var row = 0; row < moduleCount; row++) {
        for (var col = 0; col < moduleCount - 6; col++) {
          if (qrCode.isDark(row, col)
              && !qrCode.isDark(row, col + 1)
              &&  qrCode.isDark(row, col + 2)
              &&  qrCode.isDark(row, col + 3)
              &&  qrCode.isDark(row, col + 4)
              && !qrCode.isDark(row, col + 5)
              &&  qrCode.isDark(row, col + 6) ) {
            lostPoint += 40;
          }
        }
      }

      for (var col = 0; col < moduleCount; col++) {
        for (var row = 0; row < moduleCount - 6; row++) {
          if (qrCode.isDark(row, col)
              && !qrCode.isDark(row + 1, col)
              &&  qrCode.isDark(row + 2, col)
              &&  qrCode.isDark(row + 3, col)
              &&  qrCode.isDark(row + 4, col)
              && !qrCode.isDark(row + 5, col)
              &&  qrCode.isDark(row + 6, col) ) {
            lostPoint += 40;
          }
        }
      }

      // LEVEL4
      
      var darkCount = 0;

      for (var col = 0; col < moduleCount; col++) {
        for (var row = 0; row < moduleCount; row++) {
          if (qrCode.isDark(row, col) ) {
            darkCount++;
          }
        }
      }
      
      var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
      lostPoint += ratio * 10;

      return lostPoint;   
    }

};


//---------------------------------------------------------------------
// QRMath
//---------------------------------------------------------------------

var QRMath = {

  glog : function(n) {
  
    if (n < 1) {
      throw new Error("glog(" + n + ")");
    }
    
    return QRMath.LOG_TABLE[n];
  },
  
  gexp : function(n) {
  
    while (n < 0) {
      n += 255;
    }
  
    while (n >= 256) {
      n -= 255;
    }
  
    return QRMath.EXP_TABLE[n];
  },
  
  EXP_TABLE : new Array(256),
  
  LOG_TABLE : new Array(256)

};
  
for (var i = 0; i < 8; i++) {
  QRMath.EXP_TABLE[i] = 1 << i;
}
for (var i = 8; i < 256; i++) {
  QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4]
    ^ QRMath.EXP_TABLE[i - 5]
    ^ QRMath.EXP_TABLE[i - 6]
    ^ QRMath.EXP_TABLE[i - 8];
}
for (var i = 0; i < 255; i++) {
  QRMath.LOG_TABLE[QRMath.EXP_TABLE[i] ] = i;
}

//---------------------------------------------------------------------
// QRPolynomial
//---------------------------------------------------------------------

function QRPolynomial(num, shift) {

  if (num.length == undefined) {
    throw new Error(num.length + "/" + shift);
  }

  var offset = 0;

  while (offset < num.length && num[offset] == 0) {
    offset++;
  }

  this.num = new Array(num.length - offset + shift);
  for (var i = 0; i < num.length - offset; i++) {
    this.num[i] = num[i + offset];
  }
}

QRPolynomial.prototype = {

  get : function(index) {
    return this.num[index];
  },
  
  getLength : function() {
    return this.num.length;
  },
  
  multiply : function(e) {
  
    var num = new Array(this.getLength() + e.getLength() - 1);
  
    for (var i = 0; i < this.getLength(); i++) {
      for (var j = 0; j < e.getLength(); j++) {
        num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i) ) + QRMath.glog(e.get(j) ) );
      }
    }
  
    return new QRPolynomial(num, 0);
  },
  
  mod : function(e) {
  
    if (this.getLength() - e.getLength() < 0) {
      return this;
    }
  
    var ratio = QRMath.glog(this.get(0) ) - QRMath.glog(e.get(0) );
  
    var num = new Array(this.getLength() );
    
    for (var i = 0; i < this.getLength(); i++) {
      num[i] = this.get(i);
    }
    
    for (var i = 0; i < e.getLength(); i++) {
      num[i] ^= QRMath.gexp(QRMath.glog(e.get(i) ) + ratio);
    }
  
    // recursive call
    return new QRPolynomial(num, 0).mod(e);
  }
};

//---------------------------------------------------------------------
// QRRSBlock
//---------------------------------------------------------------------

function QRRSBlock(totalCount, dataCount) {
  this.totalCount = totalCount;
  this.dataCount  = dataCount;
}

QRRSBlock.RS_BLOCK_TABLE = [

  // L
  // M
  // Q
  // H

  // 1
  [1, 26, 19],
  [1, 26, 16],
  [1, 26, 13],
  [1, 26, 9],
  
  // 2
  [1, 44, 34],
  [1, 44, 28],
  [1, 44, 22],
  [1, 44, 16],

  // 3
  [1, 70, 55],
  [1, 70, 44],
  [2, 35, 17],
  [2, 35, 13],

  // 4    
  [1, 100, 80],
  [2, 50, 32],
  [2, 50, 24],
  [4, 25, 9],
  
  // 5
  [1, 134, 108],
  [2, 67, 43],
  [2, 33, 15, 2, 34, 16],
  [2, 33, 11, 2, 34, 12],
  
  // 6
  [2, 86, 68],
  [4, 43, 27],
  [4, 43, 19],
  [4, 43, 15],
  
  // 7    
  [2, 98, 78],
  [4, 49, 31],
  [2, 32, 14, 4, 33, 15],
  [4, 39, 13, 1, 40, 14],
  
  // 8
  [2, 121, 97],
  [2, 60, 38, 2, 61, 39],
  [4, 40, 18, 2, 41, 19],
  [4, 40, 14, 2, 41, 15],
  
  // 9
  [2, 146, 116],
  [3, 58, 36, 2, 59, 37],
  [4, 36, 16, 4, 37, 17],
  [4, 36, 12, 4, 37, 13],
  
  // 10   
  [2, 86, 68, 2, 87, 69],
  [4, 69, 43, 1, 70, 44],
  [6, 43, 19, 2, 44, 20],
  [6, 43, 15, 2, 44, 16],

  // 11
  [4, 101, 81],
  [1, 80, 50, 4, 81, 51],
  [4, 50, 22, 4, 51, 23],
  [3, 36, 12, 8, 37, 13],

  // 12
  [2, 116, 92, 2, 117, 93],
  [6, 58, 36, 2, 59, 37],
  [4, 46, 20, 6, 47, 21],
  [7, 42, 14, 4, 43, 15],

  // 13
  [4, 133, 107],
  [8, 59, 37, 1, 60, 38],
  [8, 44, 20, 4, 45, 21],
  [12, 33, 11, 4, 34, 12],

  // 14
  [3, 145, 115, 1, 146, 116],
  [4, 64, 40, 5, 65, 41],
  [11, 36, 16, 5, 37, 17],
  [11, 36, 12, 5, 37, 13],

  // 15
  [5, 109, 87, 1, 110, 88],
  [5, 65, 41, 5, 66, 42],
  [5, 54, 24, 7, 55, 25],
  [11, 36, 12],

  // 16
  [5, 122, 98, 1, 123, 99],
  [7, 73, 45, 3, 74, 46],
  [15, 43, 19, 2, 44, 20],
  [3, 45, 15, 13, 46, 16],

  // 17
  [1, 135, 107, 5, 136, 108],
  [10, 74, 46, 1, 75, 47],
  [1, 50, 22, 15, 51, 23],
  [2, 42, 14, 17, 43, 15],

  // 18
  [5, 150, 120, 1, 151, 121],
  [9, 69, 43, 4, 70, 44],
  [17, 50, 22, 1, 51, 23],
  [2, 42, 14, 19, 43, 15],

  // 19
  [3, 141, 113, 4, 142, 114],
  [3, 70, 44, 11, 71, 45],
  [17, 47, 21, 4, 48, 22],
  [9, 39, 13, 16, 40, 14],

  // 20
  [3, 135, 107, 5, 136, 108],
  [3, 67, 41, 13, 68, 42],
  [15, 54, 24, 5, 55, 25],
  [15, 43, 15, 10, 44, 16],

  // 21
  [4, 144, 116, 4, 145, 117],
  [17, 68, 42],
  [17, 50, 22, 6, 51, 23],
  [19, 46, 16, 6, 47, 17],

  // 22
  [2, 139, 111, 7, 140, 112],
  [17, 74, 46],
  [7, 54, 24, 16, 55, 25],
  [34, 37, 13],

  // 23
  [4, 151, 121, 5, 152, 122],
  [4, 75, 47, 14, 76, 48],
  [11, 54, 24, 14, 55, 25],
  [16, 45, 15, 14, 46, 16],

  // 24
  [6, 147, 117, 4, 148, 118],
  [6, 73, 45, 14, 74, 46],
  [11, 54, 24, 16, 55, 25],
  [30, 46, 16, 2, 47, 17],

  // 25
  [8, 132, 106, 4, 133, 107],
  [8, 75, 47, 13, 76, 48],
  [7, 54, 24, 22, 55, 25],
  [22, 45, 15, 13, 46, 16],

  // 26
  [10, 142, 114, 2, 143, 115],
  [19, 74, 46, 4, 75, 47],
  [28, 50, 22, 6, 51, 23],
  [33, 46, 16, 4, 47, 17],

  // 27
  [8, 152, 122, 4, 153, 123],
  [22, 73, 45, 3, 74, 46],
  [8, 53, 23, 26, 54, 24],
  [12, 45, 15, 28, 46, 16],

  // 28
  [3, 147, 117, 10, 148, 118],
  [3, 73, 45, 23, 74, 46],
  [4, 54, 24, 31, 55, 25],
  [11, 45, 15, 31, 46, 16],

  // 29
  [7, 146, 116, 7, 147, 117],
  [21, 73, 45, 7, 74, 46],
  [1, 53, 23, 37, 54, 24],
  [19, 45, 15, 26, 46, 16],

  // 30
  [5, 145, 115, 10, 146, 116],
  [19, 75, 47, 10, 76, 48],
  [15, 54, 24, 25, 55, 25],
  [23, 45, 15, 25, 46, 16],

  // 31
  [13, 145, 115, 3, 146, 116],
  [2, 74, 46, 29, 75, 47],
  [42, 54, 24, 1, 55, 25],
  [23, 45, 15, 28, 46, 16],

  // 32
  [17, 145, 115],
  [10, 74, 46, 23, 75, 47],
  [10, 54, 24, 35, 55, 25],
  [19, 45, 15, 35, 46, 16],

  // 33
  [17, 145, 115, 1, 146, 116],
  [14, 74, 46, 21, 75, 47],
  [29, 54, 24, 19, 55, 25],
  [11, 45, 15, 46, 46, 16],

  // 34
  [13, 145, 115, 6, 146, 116],
  [14, 74, 46, 23, 75, 47],
  [44, 54, 24, 7, 55, 25],
  [59, 46, 16, 1, 47, 17],

  // 35
  [12, 151, 121, 7, 152, 122],
  [12, 75, 47, 26, 76, 48],
  [39, 54, 24, 14, 55, 25],
  [22, 45, 15, 41, 46, 16],

  // 36
  [6, 151, 121, 14, 152, 122],
  [6, 75, 47, 34, 76, 48],
  [46, 54, 24, 10, 55, 25],
  [2, 45, 15, 64, 46, 16],

  // 37
  [17, 152, 122, 4, 153, 123],
  [29, 74, 46, 14, 75, 47],
  [49, 54, 24, 10, 55, 25],
  [24, 45, 15, 46, 46, 16],

  // 38
  [4, 152, 122, 18, 153, 123],
  [13, 74, 46, 32, 75, 47],
  [48, 54, 24, 14, 55, 25],
  [42, 45, 15, 32, 46, 16],

  // 39
  [20, 147, 117, 4, 148, 118],
  [40, 75, 47, 7, 76, 48],
  [43, 54, 24, 22, 55, 25],
  [10, 45, 15, 67, 46, 16],

  // 40
  [19, 148, 118, 6, 149, 119],
  [18, 75, 47, 31, 76, 48],
  [34, 54, 24, 34, 55, 25],
  [20, 45, 15, 61, 46, 16]
];

QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) {
  
  var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);
  
  if (rsBlock == undefined) {
    throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
  }

  var length = rsBlock.length / 3;
  
  var list = new Array();
  
  for (var i = 0; i < length; i++) {

    var count = rsBlock[i * 3 + 0];
    var totalCount = rsBlock[i * 3 + 1];
    var dataCount  = rsBlock[i * 3 + 2];

    for (var j = 0; j < count; j++) {
      list.push(new QRRSBlock(totalCount, dataCount) ); 
    }
  }
  
  return list;
}

QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) {

  switch(errorCorrectLevel) {
  case QRErrorCorrectLevel.L :
    return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
  case QRErrorCorrectLevel.M :
    return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
  case QRErrorCorrectLevel.Q :
    return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
  case QRErrorCorrectLevel.H :
    return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
  default :
    return undefined;
  }
}

//---------------------------------------------------------------------
// QRBitBuffer
//---------------------------------------------------------------------

function QRBitBuffer() {
  this.buffer = new Array();
  this.length = 0;
}

QRBitBuffer.prototype = {

  get : function(index) {
    var bufIndex = Math.floor(index / 8);
    return ( (this.buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1;
  },
  
  put : function(num, length) {
    for (var i = 0; i < length; i++) {
      this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1);
    }
  },
  
  getLengthInBits : function() {
    return this.length;
  },
  
  putBit : function(bit) {
  
    var bufIndex = Math.floor(this.length / 8);
    if (this.buffer.length <= bufIndex) {
      this.buffer.push(0);
    }
  
    if (bit) {
      this.buffer[bufIndex] |= (0x80 >>> (this.length % 8) );
    }
  
    this.length++;
  }
};

export {
  QRCode,
  QRErrorCorrectLevel
}
